Belt for machinery driving



A. HENDRY ET AL BELT FOR MACHINERY DRIVING Filed Sept 25, 1919 Patented Apr. 10, 1923.

TN oF lca.

BELT FOR MACHINERY DRIVING.

Application filed. September 23,1919. Serial No. 325,614.

To all whom it may concern:

Bait known that we, ALEXANDER HENDRY and lVlALooLM ALLAN HEN DRY, belting manufactu'rers, subjects of the King of Great 5 Britain and Ireland and the Isle of Man, of

252 Main Street, Bridgeton, Glasgow, Scotland, have invented new and useful Improvements in and relating to Belts for Machinery Driving, of which the following is a specification. s

I This invention has reference to improvements in and relating to beltsfor machinery driving, where these are formed of parallel layers of leather or other suitable material of laminated or like construction.

These belts as usually constructed have the exposed side surfaces of the outer layers of channel or like formation, and the stitching or attaching sewing at the centre part is thus preserved, but when'the belt gets worn by frictional'action against the striking gear, or shifting belt forks,sthecentre part also gets ultimately attacked and to obviate or lessen thisour present improvements are designed. i

This we accomplish byforming an unexposed surface of the second or next layer of a concave or like shape. This enables the adjacent or inner fiat surface of the outer layers to bear or abut against the secondary layers so that the frictional wearing surface of the striking gear or belt forks acts against the two outer side edges of these outside exposed layers, and the sewing or attaching stitching in the centre is thus preserved and the length of thewear of the belt prolonged.

By a modified arrangement, in some cases curved surfaces may be formed on the third or more layers from each side of the laminated belt to give a like compensating action; and by a further modification both surfaces of each layer may be formed of a concave or like curved shape.

In some cases there may be an irregularity of concave grooves, that is the groove or curved surface may only be intermittently formed at spaced distances apart on two or more of the strands, but the uniformity of by the concavity achieved by the combination of the number of strands.

In order that our said invention and the manner of carrying the same into effect or 05 practice may be properly understood we curved surface action would be accomplished have hereunto appended one sheet of ex Y planatory drawings in which:

Figure 1 is a transverse sectional elevation of a laminated belt havingthe layers or strands constructed accordin to this invention and assembled in position but not secured together.

Figure 2 is a similar view but illustrates the layers secured together.

Figure 3 is an elevation of one of the strands showing the longitudinal groove. Flgure 4 comprises sectional elevations of strands illustrating various forms of grooves.

Figure 5 comprises elevations of two strands when the grooves are not continuous; but the grooves of the one strand are arranged in staggered relationship with the grooves of the other strand.

Figure 6 is an elevationsimilar to Figure 3, but illustrates one of the forms of strand shown in Figure4. I I Referring to these drawings: In carrymg the improvements of this invention into effect or practice a few of the strands (it may be two, three or more) forming the laminated'belt. are made with longitudinal grooves.

As illustrated by Figure l the outer surfaces of the second, third and fourth outer unexposed strands a are formed with longitudinal grooves b of a V or concave shape so that when the strands are bound together by the stitching c the strands a ate'achside of the belt assume the formation illustrated by Figure 2.

.The section 1 of Figure 4 illustrates one of the V or like shaped grooved strands of Figures 1 and 2.

The section 2 illustrates a strand with V shaped grooves b on each side of the strand. The section 3 illustrates a curved instead of a V shaped groove 12 on one side of the strand. g

The section 45 illustrates a curved groove 5 on each side of the strand.

The section 5 illustrates a double strand secured together by longitudinal stitching a and having a V shaped groove on one side.

The section 6 illustrates a double strand secured together'by longitudinal stitching d and having a curved groove on one side.

The section 7 illustrates the double strand of section 6 with the curved groove b on both sides of the strand. i

Figure 6 is an elevation of the double sect10n6 or 7. V In Figure 5 the grooves are not continuous but then the strands are so assembledthat the grooves are arranged in staggered relationship and the resultant effect is the same as when the grooves are continuous.

Having now particularly described and ascertained the natureof our said invention and in What manner the same is to be performed, We declare that What We claim is l. A belt'forn'iachinery driving comprising" a. plurality of strips of material arranged sidebyside and secured together, an unexposed surface of an inner-strip in proximityto the outer strip having therein a groove extending longitudinally of the belt, subst'antially'as and for the purpose set forth.

'2. A belt for-machinery driving comprising a plurality of strips of material arrangedsideby side and,secured together,

the outer unexposed surfaceof an inner layer in proximity to the outer strip having therein a grooveextending longitudinallyof the belt, substantially as and for the purpose set forth. r p

3. -A belt for machinery driving comprising a plurality of strips of material arranged sideby side and secured together,

eaclrof the unexposed surfaces of an inner strip in proximity to the outer strip having therein a groove extending longitudinally of the belt, substantially as and for the purpose set forth.

4. A belt for machinery driving comprising a plurality of strips of material arranged side by side and secured together, an unexposed surface of each of the strips next to' the outermost strips having therein grooves extending longitudinally of the belt, substantially as and for the purpose set forth.

5. A belt for machinery driving comprising a plurality of strips of material arranged side by side andfsecured together, both of the unexposed surfaces of each of the strips lying next to the respective outermost strips having therein a groove extending longitudinally of the belt, substantially as and for the purpose set forth. I

6. A belt for machinery driving comprising aplurality of' strips of material arranged side by side and secured together, an unexposed surfaceof a plurality of inner layers in proximity to the outer strip having therein a series of spaced'and substantially aligned grooves extending longitudinally o-f the belt, the grooves of therespective series being arranged in staggered relationship, substantially as and for the purpose set forth.

7 A belt for machinery driving comprising a plurality of strips of material arrangedside by side and secured'together, the unexposed surfaces of apluralityof'inner strips in proximity to the outer strip having therein a series of spaced and substantially aligned grooves extending lon'gi-' tudiua-lly of the belt, the grooves of the'respective series beingarranged in staggered relationship, substantially as and for the.

purpose set forth.

8. A belt for machinery driving comprisingv a plurality of strips of material arranged side by side and secured'together, an unexposed surface of a plurality of strips next to the outermost strip having therein grooves extending longitudinally of the belt and bea-ringonthe surface of the-outer adjacent strip, substantially as and forpthe purpose set forth.

ALEXANDER HENDRY.

MALCOLM ALLAN. HENDRYQ 

